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# Pantoprazole
## Overview
Pantoprazole is a proton pump inhibitor (PPI) that suppresses gastric acid secretion by inhibiting the H+/K+-ATPase enzyme system in gastric parietal cells.
## Primary Indications
* Healing of erosive esophagitis associated with gastroesophageal reflux disease (GERD).
* Maintenance of healing of erosive esophagitis.
* Treatment of pathological hypersecretory conditions, including Zollinger-Ellison syndrome.
## Adult Dosing
* **Erosive esophagitis:** 40 mg orally or intravenously once daily for up to 8 weeks.
* **Maintenance of healing:** 40 mg orally once daily. Some patients may be treated with 20 mg orally once daily.
* **Pathological hypersecretory conditions:** Starting dose is typically 40 mg orally or intravenously twice daily. Doses may be adjusted based on clinical response. Doses up to 240 mg daily have been administered intravenously.
## Pediatric Dosing
Dosing varies by age and indication. Consult specific pediatric guidelines.
* **Erosive esophagitis (5 to 16 years):** 20 mg or 40 mg orally once daily for up to 8 weeks.
* **GERD symptom treatment (5 to 16 years):** 20 mg orally once daily for up to 8 weeks.
## Dose Adjustments
No dose adjustment is generally required for hepatic or renal impairment. However, caution may be advised in severe hepatic impairment.
## Contraindications
Known hypersensitivity to pantoprazole or any of its components.
## Adverse Effects
Common adverse effects include diarrhea, headache, dizziness, abdominal pain, and nausea. Long-term use may be associated with an increased risk of *Clostridium difficile*-associated diarrhea, bone fractures, hypomagnesemia, and vitamin B12 deficiency.
## Key Drug Interactions
* **Drugs dependent on gastric pH for absorption:** May decrease absorption of drugs like ketoconazole, itraconazole, and certain HIV protease inhibitors.
* **Methotrexate:** PPIs may increase methotrexate levels.
* **CYP2C19 substrates:** Pantoprazole is a moderate inhibitor of CYP2C19; caution with drugs like clopidogrel, though clinical significance is debated.
## Monitoring
* Monitor for signs and symptoms of hypomagnesemia (e.g., tremor, muscle cramps, seizures, arrhythmias).
* Monitor for signs of *Clostridium difficile*-associated diarrhea.
* Consider monitoring vitamin B12 levels with prolonged therapy.
## Clinical Pearls
* Administer oral pantoprazole 30 minutes before a meal.
* For intravenous administration, reconstitute and further dilute as per manufacturer instructions.
* Long-term use should be reserved for patients who require ongoing acid suppression and for whom alternative therapies are not suitable.
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*This information is intended for healthcare professionals. Always consult the current prescribing information and relevant clinical guidelines for complete details and to ensure patient safety.*
